Read Sony BM-23MK2 Service Manual online
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13
BM-23MK2
BM-23MK2
6-1. BLOCK DIAGRAM – AUDIO SECTION –
HRP901-1
AUDIO HEAD
HE901
ERASE HEAD
J101
IC501
LETTER PB AMP
IC701
SYSTEM CONTROLLER
MIC901
MIC
HRP901-2
LETTER HEAD
Q101, T101
BIAS OSC
IC101
PRE AMP
IC102
POWER AMP
J102
SP501
SPEAKER
M901
MOTOR
S102
(POWER)
S402
(FF/BACK SPACE)
TH601
S101(3/4)
S602(1/2)
S601 (1/2)
IC103
POWER AMP
IC601
MOTOR SERVO
Q501, Q502
AMP CONTROL
S101 (1/4)
Q504, Q505, Q523
E-INDEX
Q519
SWITCH
Q506
INVERTER
Q512
SWITCH
LISTEN DICT STOP
CONF DICT
S103
MIC SENS
S602 (2/2)
TAPE SPEED
2.4cm 4.8cm
S503
X701
1MHz
LCD701
E-INDEX
Q161 - Q163
LED CONTROL
S101 (2/4)
FAST PB
Q104, Q106
MUTE
Q102, Q107
MUTE CONTROL
Q103
ATT
Q105
COMP
Q509
INVERTER
S501
OFF ON
CUE / REVIEW
Q508, Q510, Q520
VOR
S504
VOR
VOR
Q701 - Q703
LCD DRIVER
LCD DRIVER
Q704 - Q706
LCD DRIVER
LCD DRIVER
Q707 - Q709
LCD DRIVER
LCD DRIVER
Q710
SWITCH
Q711
SWITCH
Q712
INVERTER
Q713
INVERTER
IC503
VOR
Q507
SWITCH
Q111
INVERTER
Q112
SWITCH
Q2, Q3, Q5
ALARM
Q611
SWITCH
Q521
SWITCH
PH501
PHOTO
COUPLER
TAP ADJ.
VCC 3V
BATT
CN102
+B
Q109, Q110
SWITCH
DRY BATTERY
SIZE "AA"
(ICE DESIGNATION)
2PCS, 3.0V
DC IN 3.0V
Q1, Q4
MUTE SW
Q715
INVERTER
Q714
INVERTER
Q516
LED CONTROL
IC502
BATT VOLTAGE DET
IC504
DC-DC CONVERTOR
Q606, Q608
VOR CONTROL
Q517, Q518
BATT DET
Q511
SWITCH
S502
D507
ON
OFF
LOCK
D503
VR101
EAR
Q601 - Q603,
Q605, Q612, Q613
SERVO CONTROL
Q503, Q513 - Q515
PHOTO REFLECTOR
DET
Q522
SWITCH
1
3
2
4
TAPE
SPEED ADJ
2.4cm
RV602
VOLUME
TAPE SPEED
2.4cm 4.8cm
MIC
PLUG IN POWER
6
7
4
23
22
17
12
13
15
10
1
REC +B
+B
PLAY +B
REC 3V
D703
PLAY +B
REC +B
REC3V
VCC3V
PLAY +B
S401
(BACK SPACE)
D701
D702
REC +B
4
1
5
8
PLAY +B
22
10
OSC
BS
4
IN.CTL
7
BATT1
23 OSC
21 COM3
COM-1
SEG 0
I
SEG7
SEG-1
I
SEG-8
11, 14 - 20
6 COM2
COM-2
5 COM1
COM-3
3VIN
3VOUT
5
RECOVERY
TIME CAP
1 INPUT
6
OUT1
7
OUT2
IN(-)
SHUTDOWN
OUT(-)
OUT(+)
TAPE
SPEED ADJ
4.8cm
RV601
8
BATT2
9
PHOTO
3
POWER
S701
3V IN
1 OUT1
2 OUT2
8
VCC
3V IN
BATT
+B
3VOUT
BATT
Q610
SWITCH
4
1
5
8
IN(-)
+B
+B
SHUTDOWN
OUT(-)
VCC3V
REC+B
OUT(+)
14
15
5
4
VREF
IN+
UOUT
VOUT
6
WOUT
13
S/S
M
Q607
SWITCH
DICT/BATT
LISTEN DICT STOP
COUNTER
RESET
LISTEN
DICT STOP
S101 (4/4)
LISTEN DICT STOP
S601 (2/2)
FAST PB
PLAY +B
Signal Path
: PB (LISTEN)
: REC (DICT)
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